Improvement in lock and electric burglar-alarm



' P. SEILER. L OCK AND ELECTRIC BUBGLAR-AL ARMS no. 194,932.

Patented Sept. 4, 1877 Mum:

UNITED STATES PAUL SEILER, OF SAN FRANCISCO CALIFORNIA, ASSIGNOR OF ONE-HALF 111s RIGHT TO JOSEPH HERZ,

' IMPROVEMENT IN LOCK AND ELECTRIC BURGLAR-ALARM.

v PATENT OFFICE;

OF SAME PLACE.

Specification forming part of Letters Patent No. 194,932, dated September 4, 1877; application filed February 19, 1877.

throw them into and out of contact, and make and break thecircuit as the bolts of the lock are moved.

It consists in a novel arrangement and construction of parts, having for their object to hold the window or door securely locked, and

prevent its being opened from the outside without giving an alarm, and showing upon the indicator the location of the dooror window being opened, as will be more fully described hereinafte The following description of my invention, and the manner of constructing and applying the same, is sufficient to enable any person skilled in the art to which it appertains to make and use or apply the same, reference being had to the accompanying drawing, and the figures and letters of reference thereon, making part of this specification.

In the accompanying drawing, Figure l is a perspective view of a part of the frame of a window having my lock applied thereto. Fig. 2 is a back view of the lock Fig. 3, a longitudinal section through the linear m, Fig. 2; Fig. 4, a side view of the lock with the bolts thrown out.

A is the plate of the lock, with slots a a, through which the pawls work, and with lugs b b cast upon its back, in proper position to form bearings for the disks of the eccentric bar 0 and for the pins d d, that act as pivots for the pawls.

B B are the pawls, that constitute the bolts of the lock or fastening, the bolt B acting to hold down the lower sash, and the one, B, operating in the same manner upon the upper sash. They are pivoted to the plate at d d, the former one at the upper and the latter one at the lower end, and they thus move out from and into the plate A at opposite ends of theii slots a.

Each pawl or bolt B is made with an i regular-shaped slot, through and within whic the eccentric bar 0 works,in such manner tha when the disks D at the ends of the bar ar turned within the bearings b b, the bolts wil move on their pivots and be thrown into or on from the face-plate.

One of the disks D is provided with a root angular slot or opening, 0, within which th end of the rod E fits, so that as the rod i turned the disks and their eccentric bar 0 wil V be moved in a corresponding direction.

By referring to Figs. 3' and 4 of the draw ing, it will be readily seen and understoo that a movement of the disk D in the direc tion of the arrow will bring the eccentric ba 0 against the partf of the slot in the pawl and cause the end of the pawl to be thrown out from the face-plate, and that a revers motion will draw it in.

Connection between the lock or fastenin and the alarm-indicator is made by means 0 the electric wires y 3 which, in the arrange ment shown i'n'Fig. l of the drawing, are le through the frame of the'window in the bot tom of the groove filled by the parting-stri z, and thus they are entirely covered and con* cealed from view when the strip is secured in place. 1

The wire 3; is connected with the metallic spring F at its lower end, as shown in the de tail drawings; but it is otherwise entirely in snlated from the other parts ofthe lock. The other wire, y, is connected with the face-plate or other suitable part of the lock, with which the spring can be brought in contact or elec tric communication when the bolts are thrown 1n.

When the bolts B are within the plate A and out of action, the eccentric bar 0 is' in position farthest from the back of the plate and at this point it is in contact with the in sulated spring F, so that the current is es tablished between the two wires, and the in dicator is operated; but when the lock is turned to throw out the bolts B and fasten the window, the communication between the wires is broken, for the eccentric bar 0 is turned away from the spring F, and the interruption of the current shows upon the dial of the indicator the condition of thefastenings, whether locked or unlocked.

This lock or fastening can be constructed for particular application to doors and other openings,- as well as windows; and one or more pawls or bolts, B, may be employed, as the strength may seem to require. The plate of the lock can be concealed from view on the outside by being let into the frame or woodwork, and covered to prevent it being tampered with.

Thearrangementof the eccentric bar G and its disks with the irregular slot in the pawl B causes the lock mechanism to operate inra l positive manner, and the bolt to be held without the use of springs and tumblers, making the parts both strong and simple in construction.

The rod E extends through the frame or casing, and it has a handle, G, by which the lock is operated from the inside of the apartment. Theend of the rod is'mad'e square, or with akey or feather upon it, which engages with a slot or recess in the disk D, and as the handle is'turned the disk and the eccentric bar 0 are operated. The length of this rod'E is governed by the location of the look within the frame or casing. g

As thus constructed, my invention constitutes a strong and secure look as well as a burglar-alarm,'for the pawlsB that form the bolts of the lock cannot be moved into and within the face-plate without bringing the eccentricbar U and the spring F into contact with each other, and the pawls themselves cannot be moved from the outsideunless they are broken and driven into the'lock by force, and in such case the eccentric bar 0 would be thrown: against the spring, and given alarm.

The form of the slot f in. the pawls B is such that when the eccentric bar 0 is turned to throw and hold out the pawls the curved part of the slot in contact with and bearing against the bar 0 brings an increased amount of metal in line with: the resistance ofl'ered by the bar, and thus adds to the strength of the pawl, and prevents its being improperly forced or broken from the outside without breaking the eccentric bar and bringing it or some portion of the lock in contact with the spring F.

gthe face-plate of the lock, and with suitable operating mechanism, substantiallyras described, whereby, when the pawl is held out from the lock-plate,'an'increased or greater amount of metal of the pawl is in line with and bearing against the eccentric bar (3', or equivalent moving mechanism, constructed and arranged substantially'in the mannerandfor the purpose described.

2. An electric burglar-alarm and lock or fastening for doors or windows, composed of the face-plate A, with its pawls or bolts B pivoted thereto, the eccentric bar 0, with its disks or bearings D D, and the operating-rod E, with a handle at one end and a square shoulder or key at the other end, which engages with a slot in the disk D, when the whole is arranged and has combined with it the insulated circuit-closing spring F and the have hereunto set myhand this 5th day of February, 1877.

PAUL SEILER.

Witnesses:

JOSEPH Hnnz', WILLIAM HABNEY. 

